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Finding the Fourth Proportional to 20,655.99, 30,987.96 and 8,809.54

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Solution

The fourth proportional to 20,655.99, 30,987.96 and 8,809.54 is: 13,216.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655.99 : 30,987.96 = 8,809.54 : x
  2. Step 2: Convert to fraction form
    20,655.99/30,987.96 = 8,809.54/x
  3. Step 3: Cross multiply
    20,655.99x = 30,987.96 × 8,809.54
  4. Step 4: Simplify right side
    20,655.99x = 272,989,673.14
  5. Step 5: Solve for x
    x = 272,989,673.14/20,655.99
  6. Step 6: Final answer
    x = 13,216.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.